So long as the Service and Limit names used by Trusted Advisor (and returned
in its API responses) exactly match those shown below, all limits listed in
Trusted Advisor “Service Limit” checks should be automatically used by
awslimitchecker. The following service limits have been confirmed as being
updated from Trusted Advisor:

The limits listed below can be retrieved directly from their Service’s
API; this information should be the most accurate, and is used with higher
precedence than anything other than explicit limit overrides:

The section below lists every limit that this version of awslimitchecker knows
how to check, and its hard-coded default value (per AWS documentation). Limits
marked with (TA) are comfirmed as being updated by Trusted Advisor.

Note on On-Demand vs Reserved Instances: The EC2 limits for
“Running On-Demand” EC2 Instances apply only to On-Demand instances,
not Reserved Instances. If you list all EC2 instances that are
running in the Console or API, you’ll get back instances of all types
(On-Demand, Reserved, etc.). The value that awslimitchecker reports
for Running On-Demand Instances current usage will not match the
number of instances you see in the Console or API.